It's not pushing GREASE from the drive flanges, it's pushing as in rotating the axles and pinion because the drive flanges are still on. He was going to remove the DS so it wouldn't turn and I wanted to point out that doesn't work unless you have locking hubs or stripped DF.OK help me out here. How is knuckle grease pushed into the differential from the drive flanges?
I agree on the breather fitting getting plugged when there is mixing of diff oil and birfield grease, but that's due to a failed inner seal. Or what am I missing?